QT Creator jumps from the toolBar of one UI page to another UI window, and minimizes it to the maximum (2)

purpose

I have already introduced adding ToolBar in the toolbar to open another UI interface;
now it is opened in another scenario. After pressing the button on the opened interface, it returns to the main interface, but there is still work being done from the interface. When you return to the main interface, you don’t want the slave interface to be closed, but minimize it;
when you open it next time, you still want to return to the last opened interface instead of the newly opened interface.

Do it

1 create ui interface

Added toolbars in the interface, 1&2